Ok, first, a little conversion...
82.3 Pa = 0.33 inch water column (excellent). 2.8 Cubic meter per minutes = 99 cfm (not great). Overall, that fan is good!
Is it a
DC centaur mark 5 or a
DC Centaur 3 blade ?
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Sorry about the mobo confusion, I was thinking about the A7M266-D, not A7M266.
Let us know what you want to try!